Metal deforming – By deflecting successively-presented portions of work during... – With cutting of work or product
Patent
1980-06-17
1982-10-12
Combs, Ervin M.
Metal deforming
By deflecting successively-presented portions of work during...
With cutting of work or product
72203, 72181, B21B 104
Patent
active
043532357
ABSTRACT:
Method and means for preforming the long edges of steel plate prior to manufacture into pipe by the U-O Process or the like by utilizing plate of a width exceeding that required for pipe of a given diameter by an amount at each edge having an excess at least equal to the width of the pipe. Roll-forming the plate to use the excess width thereof as a lever arm to obtain a bend at the bitter edges of the pipe (edges required for pipe) of a radius required for the pipe and thereafter shearing the plate to form the bitter edges, followed by bevelling and polishing the bitter edges, and further roll-forming the edge area to complete the preform thereof.
REFERENCES:
patent: 735936 (1903-08-01), Blakey et al.
patent: 2098989 (1937-11-01), Yoder
patent: 3606671 (1971-09-01), Pearson
patent: 3765211 (1973-10-01), Struss
patent: 4148426 (1979-04-01), Midzutani et al.
Combs Ervin M.
Kaiser Steel Corporation
Toomey James E.
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